/*
 * Copyright (C) 2021 Alyssa Rosenzweig <alyssa@rosenzweig.io>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef __UTIL_H
#define __UTIL_H

#include <string.h>

#define UNUSED __attribute__((unused))
#define MAX2(x, y) (((x) > (y)) ? (x) : (y))
#define MIN2(x, y) (((x) < (y)) ? (x) : (y))
#define ALIGN_POT(v, pot) (((v) + ((pot) - 1)) & ~((pot) - 1))

static uint32_t
fui(float f)
{
	uint32_t u = 0;
	memcpy(&u, &f, 4);
	return u;
}

static float
uif(uint32_t u)
{
	float f = 0;
	memcpy(&f, &u, 4);
	return f;
}

/* Pretty-printer */
static void
hexdump(FILE *fp, const uint8_t *hex, size_t cnt, bool with_strings)
{
	unsigned zero_count = 0;

	for (unsigned i = 0; i < cnt; ++i) {
		if ((i & 0xF) == 0)
			fprintf(fp, "%06X  ", i);

		uint8_t v = hex[i];

		if (v == 0 && (i & 0xF) == 0) {
			/* Check if we're starting an aligned run of zeroes */
			unsigned zero_count = 0;

			for (unsigned j = i; j < cnt; ++j) {
				if (hex[j] == 0)
					zero_count++;
				else
					break;
			}

			if (zero_count >= 32) {
				fprintf(fp, "*\n");
				i += (zero_count & ~0xF) - 1;
				continue;
			}
		}

		fprintf(fp, "%02X ", hex[i]);
		if ((i & 0xF) == 0xF && with_strings) {
			fprintf(fp, " | ");
			for (unsigned j = i & ~0xF; j <= i; ++j) {
				uint8_t c = hex[j];
				fputc((c < 32 || c > 128) ? '.' : c, fp);
			}
		}

		if ((i & 0xF) == 0xF)
			fprintf(fp, "\n");
	}

	fprintf(fp, "\n");
}

#endif
